Strain monitoring of dual-room box-girder during prestressing tension based on fiber Bragg grating sensor

Dansheng Wang; Tao Jin; Hongping Zhu; Weiping He; Ming Li

doi:10.1117/12.923173

12 April 2012 Strain monitoring of dual-room box-girder during prestressing tension based on fiber Bragg grating sensor

Dansheng Wang, Tao Jin, Hongping Zhu, Weiping He, Ming Li

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 84092P (2012) https://doi.org/10.1117/12.923173
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

Abstract

Monitoring techniques based on fiber Bragg grating sensor have proved to exhibit meaningful benefits when compared with the current solutions of an electric nature in recent years. In this study, several fiber Bragg grating (FBG) strain sensors were embedded into a prestressed concrete dual-room box-girder when construction at a prefabrication workshop to monitor strain of concrete girder during prestressing tension. All FBG sensors are alive during monitoring, which shows the advantages of robust surviving capability and long-term on-line monitoring performance. From the monitoring results it is found that the variances in strain at the measurement sites are small and almost is linear with time in certain one tension process, and the strain at the measurement sites almost synchronously and linearly change with the increase of the prestress. It is also found that the changes in strain at the measurement sites during the final tension are larger than that during the early tension.

Citation Download Citation

Dansheng Wang, Tao Jin, Hongping Zhu, Weiping He, and Ming Li "Strain monitoring of dual-room box-girder during prestressing tension based on fiber Bragg grating sensor", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84092P (12 April 2012); https://doi.org/10.1117/12.923173

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